Component description for the exhaust gas recirculation positioner - GF14.20-P-4007P

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ENGINE 642 in MODEL 203.0 /2, 209.3 /4, 219.3, 221.0 /1

ENGINE 642.920 in MODEL 211.020 /220 /620

ENGINE 642.921 in MODEL 211.084 /089 /284 /289

ENGINE 642 in MODEL 164.1 /8, 251.0 /1 except CODE (494) USA version

ENGINE 642.920 in MODEL 211.022 except CODE (494) USA version

ENGINE 642.920 in MODEL 211.022 /222 except CODE (498) Japan version

ENGINE 642 in MODEL 463.3

Fig 1: Identifying Left Exhaust Gas Recirculation

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The left exhaust gas recirculation positioner is located at the rear on the left next to the turbocharger.

Task

In order to reduce nitrogen oxide (NO_X ) emission the exhaust gas is led into the engine intake tract. This takes place via a duct, whose cross-section can be modified by the left exhaust gas recirculation positioner. The left exhaust gas recirculation positioner is actuated via the CDI control unit (N3/9).